When a baby is born, the anterior-posterior diameter of the eyeball is short, about 12.5- 15 mm, and the vertical diameter is about 14.5- 17 mm, which is shorter and the refractive power of the lens is larger. Therefore, light from distant objects can easily be imaged behind the retina and become hyperopia.
The eyeball grows fastest in the first year and gradually develops into a sphere. The fertility rate drops at the age of 3, approaches the adult size at the age of 5-6, and does not complete its development until 14.
In different periods, the growth speed of different parts of the eyeball is also disproportionate, and the growth of the back part is faster than that of the front part. Therefore, the axial length of the eyeball increases, hyperopia gradually decreases, and the anterior and posterior axes of the eyeball are fully developed, which makes it a right eye. It is a physiological phenomenon that children before the age of 6 have mild hyperopia.
If the child is stunted due to diseases, diet and other factors, the eyeball will still stay in hyperopia and suffer from hyperopia. If the eyeball goes through a stage of development and becomes emmetropia, the possibility of hyperopia is very small. So children are prone to farsightedness.
Because children have strong adjustment ability, hyperopia children before the age of 6 generally do not need glasses. However, if the child has high hyperopia, decreased vision or strabismus, it must be corrected with glasses. The optician can subtract about 1-2 diopters to adapt to the tension of the ciliary muscle.
If there is entropion, correct it as much as possible. For children over 6 years old, hyperopia tends to decrease. Therefore, it is best to optometry 1 time a year and gradually reduce the degree of glasses. Otherwise it is easy to induce exotropia, which will develop into amblyopia for a long time.
Children have farsightedness. It stands to reason that they can't see clearly. However, because his (her) eyes have a strong ability to adjust, if the degree of hyperopia is not high, they can overcome it by adjustment, so they can still see the near and far goals clearly. If he (she) has a high degree of farsightedness, he (she) can't see the near and far goals clearly.
Generally speaking, if children and adolescents have hyperopia, if it is below 200 degrees, their eyesight will decline. Especially at hyperopia height above 500 degrees, the visual acuity drops more obviously, and some of them form amblyopia. If you have hyperopia, you need to dilate your pupils and optometry.
If the degree is light and does not affect your eyesight, you don't need to wear glasses. If the degree is high, it will affect your eyesight, or you have symptoms of eye fatigue, you should wear glasses. If it is hyperopia, wearing glasses, the vision cannot be corrected to 1.0, which belongs to amblyopia and needs further examination and treatment.
After wearing glasses, the luminosity will change with age, so after six months to one year, you should expand your eyes again and replace your glasses.
Diet can supplement protein, a food rich in calcium and vitamins.
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